package String_learning;

public class Code16 {
    //拼接字符串
    public static void main(String[] args) {
        //定义数组
        int[] arr = {1,2,3};

        //调用方法把数组变成字符串
        String str = arrToString(arr);
        System.out.println(str);
    }

    public static String arrToString(int[] arr) {
        StringBuilder sb = new StringBuilder();
        sb.append("[");
        for (int i = 0; i < arr.length; i++) {
            if (i == arr.length - 1){
                sb.append(arr[i]);
            }else {
                sb.append(arr[i]+",");
            }
        }
        String result = sb.append("]").toString();
    return result;
    }
}
